Rock crusher



Feb. 1.1, 1941. D. Bol.x's\vx,\1'-,|v 2,231,491

,. ROCK CRUSHER Filed Jan. 1.1,'1939 2 sheets-sheet 1 v l'mventor (Ittorngg C. D. BOUSMAN ROCK CRUSHR Feb. 11, 1941.

Filedy Jan. 11,. 1939 2 Sheets-Sheet 2 Patented Feb. 1.1, 1941 UNITED STATES PATENT OFFICE 2 Claims.

My invention relates Ito improvements in rock crushers. It relates particularly to rock crushers of a type having an upwardly flaring Crusher bowl having a passage extending downwardly therethrough, and a bridge across the passage at the top of the bowl; a spider across the passage below the bridge; an axial shaft in the passage having its ends anchored to the bridge and spider; a gyratory crusher cone vertically `ad- ]0 justable between the bridge and the spider and encircling the shaft; a rotary sleeve eccentric encircling the shaft and extending into the cone for gyrating the latter; bearings between the sleeve eccentric and the shaft and the cone; an oil receiver or tank disposed on the spider for catching oil dripping from the bearings, and means for circulating oil between the tank and bearings.

One oi the objects of my invention is the provision of no-vel means by which the shaft may be partly supported by the bridge when the parts are operatively assembled, permitting the use of a lighter spider, and wholly supporting the shaft when the cone, spider, and tank are removed for any purpose.

Another object of my invention is the provi-` sion of a structure which vertically adjustably suspends the cone from the bridge.

Another object of my invention is the provision of a novel structure which permits, on disassembling, the removal of the spider and the supporting of the cone independently ofl the spider, thereby enabling a relatively light spider to be employed, which novel structure permits the ,i removal downwardly from the crusher bowl of the cone, and enabling the crusher to be easily and quickly assembled or disassembled with relatively light tackle.

Another object of my invention is the provision of novel means for eiecting the circulation of oil between the oil tank and the cone and eccentric bearings.

Another object of my invention is the provision of a novel oil tank structure and means for supporting it removably for repair and cleansing purposes.

Still another object of my invention is the provision of a novel rock Crusher of the kind described, which is relatively simple, and economical likely to get out of order, which can be easily and quickly assembled and disassembled, and which is efficient in operation. The novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawings, which illustrate my invention,

Fig. 1 is a central vertical sectional View ofmy improved rock crusher.

to manufacture, which is strong, durable, not

Fig. 2` is a reduced top view thereof, parts being broken away.

Fig. 3 is a reduced bottom View thereof, partly broken away.

Fig. 4 is a reduced side elevation of the same.

Fig. 5 is a reduced side view, partly in vertical section and partly lin side elevation, showing the cone more elevated than in Fig. 1.

Fig. 6 is a section on the line 6-6 of Fig. 1, partly broken away.

Fig. 7 is a section on the line 1-1 of Fig. 1.

Fig. 8 is a reduced side view, partly in Vertical section, and partly -in side elevation of a modification of my invention.

Similar characters o-f reference designate similar parts in the different views.

I designates a crusher bowl, the upper inner portion of which flares upwardly and has within it a hardened lining 2. The bowl I has extending downwardly through it a passage 3, the upper end o-f the bowl having extending across said passage a bridge 4.

The open lower end of the passage 3 has extending across it a spider 5, which is removably fastened to the lower end of the bowl I by bolts 6. The spider 5 has a central Icircular opening in which is removablyfastened by bolts 'I a base plate 8 of an oil tank, which is open at its top and has side walls 9. Slidably tted on the reduced upper end I0 of the ol tank is a connecting tube I I adapted to catch oil from above, and convey it into the end portion lil of the oil tank.

A stationary vertical shaft I2 is disposed axially in the passage 3, and has its upper end I3 of reduced diameter extending through a vertical central hole in the bridge 4. The upper end of the portion I3 is threaded, and has fitted on it a nut I4 which-rests on top of the bridge 4, whereby the bridge partly supports the shaft I2, when the parts are operatively assembled, and which may be used tosupport the shaft I2 wholly on assembling or disassembling.

The lower end of the shaft I2 is fitted in a hole extending centrally through the base plate 8, the shaft having a shoulder I5 which rests on the base plate 8, the extreme lower end portion I6 of the shaft I2 being threaded and having fitted on it anut I'I which bears against :the bottom of the base plate 8, whereby the latter aids in supporting the shaft I2. y

y Revoluble around and spaced from the shaft I2 is asleeve I8, on the lower end of which is tted abevel gear wheel I9, which rests on balls 20 supported on the base plate 8, and held spaced apart by a spacing ring 2l, which encircles the shaft l2, and which has perforations respectively containing the balls 20.

A bevel pinion 22 meshing with the gear I9 drivesthe latter, which, being fastened to the sleeve I8 revolves thelatter. The pinion 22 is fastened on one end of a horizontal shaft 23, which is driven by any suitable power means, not shown. The shaft 23 extends through a bearing 24 attached removably to the side Wall 9 of the oil tank, and closing a hole in said side wall, said hole having a diameter greater than the diameter of the pinion 22, whereby the latter can be withdrawn from the oil tank, when the shaft 23 is withdrawn with the bearing 24. The shaft 23 is rotatably and slidably mounted in a hole through the side wall of the bowl I. i

Between and bearing against the shaft I2 and the sleeve I8 are disposed circularly arranged bearing rollers 25. The upper portion ofI the sleeve I8 has an eccentric portion 26 disposed in a central vertical hole which extends through a crushing cone 21 having a hardened inner lining 28. Circularly arranged vertical rollers 29I are disposed between the eccentric portion 26 and the cone lining 28.

The crushing cone 21 is disposed within the upper portion of the bowl I, and cooperates with the hardened lining 2 of the bowl for crushing rock which is fed into the upper end of the bowl.

Means are provided, as shown in Fig. l, for suspending the cone 2'I from the bridge-4 so that it can be vertically adjusted to limit the coarseness of the crushed rock discharged from between the bowl lining 2 and the cone 21 downwardly through the passage 3 and between the bowl I and the spider 5.

Such suspending means, as shown in Fig. 1, comprises the following described parts. Two vertical screws 30 have their lower threaded portions vertically adjustably fitted respectively in two threaded holes 3l which extend downwardly in the cone 21 from the upper end thereof. The screws 30 respectively extend through two vertical holes 32 in the bridge 4 at opposite sides of the axis of the cone 21. The holes 32 are of suflicient diameter to permit the screws 39 to gyrate therein, when the cone 21 is gyrated by the eccentric 26.

The screws 39 respectively extend through two circular bearing plates 33 which respectively rest on two sets of balls 34 mounted in the races of two bearing plates 35, which respectively rest in circular recesses 36 in the upper side of the bridge 4, said plates 35 having enlarged holes 31 through which extend the screws 30. The heads of the screws 30 rest in recesses provided therefor in the upper sides of the bearing plates 33. The bearing plates 33 gyrate on the balls 34, when the cone 21 and screws 30 are gyrated.

Two nuts 38 on the screws 30 respectively hold two collars 39 slidably against the under side of the bridge 4. Two lock nuts 40 on the screws 30 respectively bear against the upper end of the cone 21.

An externally threaded sleeve 4-I fitted on the shaft I2 has its lower end resting on the top of the eccentric sleeve I8, its upper end bearing against the under side of the bridge 4. Fitted on the sleeve 4I is a threaded collar 42 adjustable on the sleeve 4l so as to -rest on the upper side of a flat horizontal ring 43 disposed in a circular recess in the upper end of the cone 21. An oil space 44 is provided between the upper ends of the bearing rollers 29 and the upper end' of the eccentric sleeve I8.

An axial oil passage 45 extends downwardly from the upper end of the shaft I2 to transverse passages 46 and 41 in the shaft I2. The passage 46 discharges oil into the oil space 44, and the passage' 41v discharges'into the annular space in which `are located the bearing rollers 25. The rollers 29 rest -at their lower ends on the upper end of a tube 48 encircling the sleeve I8, said ring having an annular peripheral ange 49, which is releasably fastened to the lower end of the cone 21.

Transverse oil passages 58 through the eccentric portion 26 of the sleeve I8 connect the .annular passages respectively containing the bearing rollers 25 and 29.

Encircling and spaced from. the tube 48 is the connecting tube II, which catches the oil discharged from the lower end of the tube 48 and conveys the oil so caught into the oil tank. A coil spring 5I encircles the reduced upper end portion I of the oil tank, the lower end of the spring resting on the top of ther oil tank, and its upper end bearing against the lower end of the connecting tube I I, the tension of the coil spring I serving to normally hold the upper end of the connecting tube II against the under side of the ange 49, which, with the cone 21, gyrates.

For supplying oil from the oil tank to the passage 45 in the upper end of the shaft I2, a horizontal pipe 52 has its inner threaded end fitted removably in a threaded hole in the side wall 9 of the oil tank, the pipe v52 being slidably extended through the side wall of the bowl I, and being connected at its outer end releasably by a connection 53 with a pipe 54 which is connected to the intake of a pump 55, the outlet of which is connected to one end of a pipe 56, the other end of which is iitted and discharges into thepassage 45. Any suitable means, not shown, may be used to operate the pump 55.

When the pump 55 is operated, oil is taken from the oil tank through the pipes 52, 54, pump 55, and pipe 56, and discharged into the passage 45 from which it passes by the 4B and 41 into the annular spaces containing the bearing rollers 25 and 25, fromv which the oil passes into and through the tube 48, thence through the tube II into the oil tank.

The lower end of the bowl I has an outer peripheral flange 51 which rests on pedestals 58 to which it is -anchored by bolts 59 and nuts 60.

In operation, when the shaft 23 is rotated by a, motor or engine, not shown, the pinion 22 will revolve the gear I9, thus revolving the sleeve I8 and with it its eccentric 26, thereby gyrating the cone 21, which with the bowl lining 2 will crush rock fed into the upper end of the bowl I, the crushed rock falling through the passage 3, past the spider 5, to be caught or conveyed as desired.`

The pump 55 being operated, the oil will be circulated from the oil tank 9, as hereinbefore described between the two sets of bearing rollers 25 and 29, tube 48 and connecting tube II back into the oil tank.

When it is desired to change the coarseness of the crushed rock, the nuts 38, 40 and 42 are loosened, and the screws 30 turned to adjust the crusher cone 21 upwardly, to make the crushed rock finer, or downwardly, to make the crushed rock coarser.

To disassemble the Crusher, for any purpose, as for removing and replacing worn parts, as the sleeve I8, or bearing rollers 25 or 29, the nut I1 is removed fromthe lower end of the shaft I2, the connection 23 adjusted to separate the tubes 52 and 54, the tube 52 turned to withdraw it from the tank wall 9, and the bolts 1 removed. The bearing 24 is then released from the tank wall 9, and it, the pinionV 22 and shaft 23 are then withdrawn outwardly beyond the base plate 8, following which the oil tank, connecting tube II, bearing rollers 20, gear I9, spacing plate 2l, sleeve I8, bearing rollers 25 and 29, and spring 5I may then be removed downwardly out of the bowl I.

The cone 21 and the shaft I2 will still be suspended from the bridge. 4.

If it is desired to remove the cone 21 and shaft I2, the bolts 6 are withdrawn, and the spider 5 removed. The nut I4 is removed and the shaft I2 removed downwardly. The screws 30 are then turned to withdraw them from the cone 21, following which the co-ne 21 removed downwardly ont of the bowl I, and with it the sleeve 4I and the nut 42.

To reassemble, this procedure is reversed. By means of the construction of the Crusher, as it has been described, the Crusher may be easily and quickly assembled or disassembled with relatively light tackle. As the bridge 4 is employed to wholly support the heavy cone 21, and to partly support the shaft I2, spider 5, oil tank, bearing rollers 25 and 29 and the eccentric sleeve I8, a relatively light spider 5 may be used,` thus reducing the weight of the crusher and its cost of manufacture, While retaining the necessary -strength to enable it to eniciently operate in doing heavy crushing work for a long period of time.

In the modification, shown in Fig. 8,. most of the parts correspond in structure and mode of operation to the Crusher shown in the other figures. The principal difference consists in the means for supporting the crusher cone 21 from the bridge 4'.

In the modified form, the shaft I2 of the other form shown is replaced by a shaft I2', the lower end portion of which corresponds tothe lower end portion of the shaft I2 of Fig. 1, the upper end of the shaft I2 having an axial hole into which extends the lower end portion 6I of an axial shaft 62 which is threaded and extends through an axial hole 63 in the bridge 4. Two nuts 64 and 65 on the shaft 62 respectively Ibear against the upper and lower sides of the bridge 4', thus suspending the shaft 62.

The shaft 62 has a circular peripheral flange 66 in a recess in the upper end of the cone 21. Balls 61 are disposed in a race in the upper side of the flange 66 and support a circular plate 6B fastened by bolts 69 to the upper end of and supporting the cone 21. The plate 68 has a hole 10 larger in diameter than the shaft 62 which extends through said hole, thus permitting the plate 68 to gyrate with the cone 21.

A sleeve I8, corresponding to the sleeve I8 of the other form of my invention, is disposed between bearing rollers 25 and 29, and has an eccentric portion 26 mounted between said rollers for gyrating the cone 21, in the manner hereinbefore described.

The upper end of the shaft 62 has an oil passage 1I which discharges laterally at its lower end onto the ange 66 and into the annular spaces containing the rollers 25 and 29. The oil tube 56 enters and discharges into the oil passage 1I. In other respects, the structure and mode of operation corresponds to that of the form shown in Fig. 1.

When the shaft 23 is rotated, the eccentric sleeve I8 will be revolved, and gyrate the cone 21, in the manner already described.

The pump 55 being operated. oil will be circulated from the oil tank through the pipes 52,

54, pump 55 and pipe 56, oil passage 1I and its branches into the annular spaces containing the rollers 25 and 29, and thence through the connecting tube II back to the oil tank.

To vertically adjust the cone 21the nut 65 is loosened and the nut 64 turned to raise or lower the shaft 62, which is slidable in the hole 63, thus vertically adjusting the cone 21 by means of the flange 66, bearing balls 61 and plate 68. The portion 6I of the shaft 62 is vertically slidable in the shaft I2'. A sealing nut 12 on the shaft 62 covers the hole 10 in the plate 68, which gyrates slidably under said nut 12, which nut 12 prevents oil passing upwardly through said hole 1I).

` Other modifications of my invention, within the scope of the appended claims, may be made without departing from the spirit of my in- Vention.

What I claim is:

l. In a rock crusher, in combination, a crusher bowl having a passage extending downwardly therethrough, and having a bridge across said opening, a removable spider across said opening below said bridge, said spider having a central opening, an oil tank having a top opening and a base serving as a removable closure for said central opening, means releasably attaching said tank base to said spider, an axial stationary shaft supported at its lower end on said tank base and having its upper end releasably attached to said bridge, a driving sleeve encircling said shaft and having an eccentric portion, a crusher cone encircling said eccentric portion and removable downwardly through said passage when said spider is removed, bearing means between and engaging said eccentric portion and said cone by which said cone is gyrated, bearing means between and engaging saideccentric portion vand said shaft, means independent of said shaft for revolving said sleeve, means for pumping oil from said tank and for conveying said pumped oil upon the upper end portions of said two bearing means, an oil conducting tube slidably engaging the upper end portion of said tank for discharging oil driping from said two bearing means into said tank, said tube encircling said sleeve and spaced therefrom, resilient means normally forcing said conducting tube upwardly with the upper end of said tube against the lower end of said cone, and means for vertically adjusting said cone in said bowl.

2. In a rock crusher, in combination, a Crusher bowl having a passage extending downwardly therethrough, and having across said passage a removable spider having a central opening, a closure removably closing said opening, a vertical stationary shaft in said passage having its lower end supported by said closure, a Crusher cone in said passage encircling said shaft above said closure, means for gyrating said cone around said shaft said means being in bearing engagement with said shaft and said cone, means Vertically adjustably suspending said cone, a tubular member encircling said shaft and supported on and removable with said closure and forming therewith an oil tank, means for pumping oil from said oil tank and for discharging the oil between said shaft and said cone adjacent to the top of said cone, and means for catching oil passing downwardly between said shaft and said cone and discharging the oil so caught into said tank.

CLAUDE n. BoUsMAN. 

